# Peer Instruction Questions (10 items)
Q1–Q3: Classify separations on Diagram 1 (edge cases included).
Q4: Which worldline accumulates less proper time, and why?
Q5: Identify where acceleration occurs from curvature.
Q6: A vector exactly on the cone boundary represents… (light-like).
Q7–Q8: Moving Σ changes which of the following? (Simultaneity yes; causal class no.)
Q9: From event E, can information from C (space-like separated) be known? Explain.
Q10: Ethical prompt: decide where action is meaningful given E's future cone.
